4/. Refer to Figure 21-24. At his optimum, Steve is willing to give up about a. 0.75 pounds of pears for 1 pound of apples. b. 0.75 pounds of apples for 1 pound of pears. c. 1.20 pounds of pears for 1 pound of apples. d. 1.20 pounds of apples for 1 pound of pears